Riveting machine



June 30, 1942.

E. D. TAYLOR RIVETING MACHI NE 7 Filed Nov. 12, 1938 I EBEN .Zj. TA v1.1:

Patented June 39, 1942 UN i'TED STAT ES rarest @FFHQE REVET'ING MACHINE.

Eben D. Taylor, Jackson, Mich, assignor to Tomkins-Johnson Company, Jackson, Mich, a corporation of Michigan Claims.

This invention relates to riveting machines equipped with rivet clamping jaws and more particularly to structure for moving the jaws with respect to the rivet set during the heading up operation.

The copending application of Loyd A Ward,

Serial No. 101,210, filed September 1'7, 1936, discloses one particular form of structure for moving the rivet clamping jaws with respect to the rivet set. The present invention is another em bodiment of the invention disclosed in this application. In the moving of rivet clamping of the character supported by cantilevered leaf springs, a yieldable connection between the moving structure and the jaws is necessary to prevent the possibility of breakage of the cantilevered leaf spring on the raising of the jaws should a rivet be accidentally turned 'sidewise or be otherwise caught in the jaws. In the place of the resilient connection between the jaw moving structure and the jaws disclosed in the aforesaid application, the present invention contemplates the use of a frictional connection.

An object of the present invention is to provide a yieldable connection between rivet clamping jaws and the means for moving the jaws.

Another object of the invention is to provide a frictional connection between rivet clamping jaws and the means for moving the jaws.

A further object of the invention is to provide a carrier for rivet clamping jaws and a sliding connection between the carrier and the jaw moving means.

A still further object of the invention is to provide riveting machines having rivet clamping jaws and a yieldable connection between the jaws and the ram, for moving the jaws by the ram.

These and other objects will be apparent from the following specification when taken with the accompanying drawing, in which:

Fig. 1 is a vertical section of a portion of a riveting machine disclosing the ram, rivet clamping jaws and jaw moving structure,

Fig. 2 is a vertical section of a portion of the riveting machine showing the ram and jaws of Fig, 1 in a plane vertical to the section of Fig. 1, and

Fig. 3 is a section on the line III-III of Fig. 1.

Referring particularly to the drawing, the refercnce character I designates the riveting machine frame, in which is slidably disposed a ram 2 reciprocable in the frame I by a suitably driven connecting rod 3. Mounted in the lower end of the ram 2 is a rivet set 4.

' member 8.

A pair of rivet holding jaws 5 is provided for disposing a rivet in position to be headed up by the set t. Rivets may be inserted between the jaws 5 in any desired and known manner. Each of the jaws 5, is secured to the end of a leaf spring 6, which in turn are secured by their opposite ends, to the sides 7 of a channel-shaped The member 8 constitutes a slide slidable up and down in a slideway 9.

The member 8 has disposed between the side portions l thereof a block It provided with a central recess II. The pins l2 are employed to connect the block It to the member 8. It will be observed in viewing Fig. 1 that the left side of the block I5 is in slidable engagement with the sildeway 9, while the right side of the block it! is slightly spaced at the upper and lower portions thereof, on opposite sides of the recess H, from the bottom of the channel-shaped member 8. Projecting between the bottom of the channel-shaped member 8 and the right side of the block H], as viewed in Fig, 1,is an elongated bar-like member l3 extending substantially parallel tothe ram 3 and having its upper end oifset and secured to the ram 3 by a screw 14. Within the recess H is a loose bowed leaf spring 15 and a friction shoe it. As will be seen from Figs. 1 and 3, the leaf spring l5 urges the shoe I6 against the member l3 and the member it against the bottom of the channel-shaped member 8, thereby frictionally and yieldably holding the member [3 with respect to the member 8.

It will be clear from Fig. 1 that as the ram 2 reciprocates up and down under the action of the connecting rod 3, the member l3 will move with it, and. through the frictional connection comprised by the member 8, the block it and associated parts, the jaws 5 will also move up and down. However, in order to limit the movement of the member 8, and thus the jaws 5, there are provided in the path of movement of the member 8 stops 2t and 2i. The stop as is fixed. The stop 2!, however, is adjustable vertically by means of a bolt 22 slidably arranged in a slot 23, the slot 23 being in a bracket 25; secured to the frame I.

In the operation of the structure according to the present invention, a rivet is fed to between the rivet clamping jaws 5 in a known manner. Then the ram 2 is moved downwardly. It will be observed from Fig. 1 that as the ram 2 moves downwardly, the jaws ii are also moved downwardly through the frictional connection provided by the shoe l6 resiliently urged against the member I3 and the associated structure.

However, when the lower portion of the member 8 reaches the stop 2|, downward movement of the jaws stops. The ram, however, continues to move downwardly, moving the set into engagement with a rivet held in the jaws 5 to project the rivet held in the jaws 5 into the work and then to upset the same in a known manner. The position of the stop 2| is adjusted to stop the downward movement of the jaws 5 just as they reach the work to be riveted, and after the heading up of the rivet has been completed, the ram 2 is moved upwardly, carrying with it through the aforedescribed frictional connection the clamp-ing j aWs 5. However, when the member 8 reaches the stop 20, the upward movement of the jaws 5 is stopped, but the set 4 continues upwardly until it is separated from the jaws 5 and in the position disclosed in Fig. 1.

When the present invention is employed in moving the jaws of riveting machines, it will be clear that since the connection between the ram 2 and the jaws 5 is yieldable, should some obstruction accidentally come between the jaws 5 so as to maintain them apart, the cantilevered leaf springs 6 will not be positively drawn up into the slideway 9 with resulting damage or breakage but will stay in a lowered position due to the slipping of the member is past the friction shoe I6.

From the foregoing description it will be evident that while I have disclosed a specific form of frictional connection between the mechanism for moving the jaws and the jaws, other types of frictional connections may be employed. Also it will be clear that instead of having the lower limit of movement of the jaws 5 adjacent the work, the lower limit of movement may be somewhat above the anvil so that the ram may move downward one step to project the rivet from the jaws 5 in position to have work positioned thereon, and in a second step to upset the rivet desire to protect by Letters Patent and claim is:

1. In a riveting machine, a frame, a set, means for operating said set, rivet holding jaws associated with said set, arms mounting said jaws, means supporting said arms, a slideway for said supporting means, said slideway being in said frame at one side of the path of movement of said set, a member connected to said set operating means, said supporting means and member having a frictional connection, and means for limiting the movement of said supporting means in said slideway, whereby said supporting means is moved by said member within limits determined by said limiting means.

2. In a riveting machine, a frame, jaws for holding a rivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held in said jaws, a slideway, said slideway being in said frame at one side of the path of movement of said set, a slide within said slideway, means connecting said jaws to said slide, a member having one end connected to said reciprocating means and the other end yieldably connected with said slide to move said jaws to dispose a rivet held in said jaws adjacent the work to be riveted, and to withdraw said jaws from adjacent said work, and stops determining the limits of movement of said slide.

3. In a riveting machine, a frame, jaws for holding a rivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held in said jaws, a slideway, said slideway being in said frame at one side of the path of movement of said set, a slide within said slideway, means connecting said jaws to said slide, a member having one end connected to said reciprocating means and the other end yieldably connected with said slide to move said jaws to dispose a rivet held in said jaws adjacent the work to be riveted, and to withdraw said jaws from adjacent said work, and means determining the limits of movement of said slide.

4. In a riveting machine, jaws for holding a rivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held in said jaws, a slideway, a slide within said slideway, means connecting said jaws to said slide, said slide having a first friction surface and a second friction surface, and means to urge resiliently said second friction surface toward said first friction surface, and a member connected to said reciprocating means extending between said friction surfaces, whereby a yieldable connection between said reciprocating means and said slide is provided for moving said jaws into position adjacent the work to be riveted, and to withdraw said jaws from adjacent said work.

5. In a riveting machine, jaws for holding a rivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held in said jaws, a slideway, a slide within said slideway, means connecting said jaws to said slide, said slide having a first friction surface and a second friction surface, and means to urge resiliently said second friction surface toward said first friction surface, a member connected to said reciprocating means extending between said friction surfaces, whereby a yieldable connection between said reciprocating means and said slide is provided, and stops determining the limits of movement of said slide.

6. In a riveting machine, jaws for holding a vivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held in said jaws, a slideway, a slide within said slideway, means connecting said jaws to said slide, said slide comprising a block having a through passage, an internal chamber at one side of and opening on said passage, and a shoe in said chamber resiliently urged toward said passage, a member connected to said reciprocating means and extending through said passage being yieldably held therein by said shoe to provide a yieldable connection between said jaws and said reciprocating means to move said jaws to dispose a rivet held in said jaws adjacent the work to be riveted and to withdraw said jaws from adjacent said work, and stops determining the limits of movement of said slide.

7. In a riveting machine, jaws for holding a rivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held in said jaws, a slideway, a slide within said slideway, means connecting said jaws to said slide, said slide comprising a block having a recess in one side thereof, a member having a portion separably connected to said block, said portion having a friction surface, said friction surface being spaced from said block to provide a through passage, and means in said recess resiliently urged toward said shoulder, a member connected to said reciprocating means extending between said friction surface and said resiliently urged means to provide a yieldable connection between said jaws and said reciprocating means to dispose a rivet held in said jaws adjacent the work to be riveted and to withdraw said jaws from adjacent said work, and stops determining the limits of movement of said slide.

8. In a machine of the character described, a way, a block reciprocable in said way, a reciprocating member, a longitudinally extending member connected to said reciprocating member, said block having a recess in one side thereof, an arcuate leaf spring member in said recess, a shoe in engagement with said spring member, a friction surface in said block at one side of said recess, said shoe being urged by said spring toward said friction surface, said longitudinally extending member projecting between said friction surface and said shoe for providing a yieldable connection between said reciprocating memher and said block, and stops for determining the limits of movement of said block.

9. In a riveting machine, a frame, a set, means for operating said set, rivet holding jaws associated with said set, a leaf spring mounting each of said jaws, means supporting said leaf springs, a slideway for said supporting means and said leaf springs, said slideway being in said frame at one side of the path of movement of said set, a member connected to said set operating means, said supporting means and member having a frictional connection, and means for limiting the movement of said supporting means in said slideway, whereby said supporting means is moved by said member within limits determined by said limiting means.

10. In a riveting machine, a frame, jaws for holding a rivet, a rivet set, means for reciprocating said set into operative engagement with a rivet held by said jaws, a slideway, said slideway being in said frame at one side of thepath of movement of said set, a slide within said slideway, means connecting said jaws to said slide, a cantilevered bar having one end connected to said reciprocating means and the other end yieldably connected to said slide to move said jaws to dispose a rivet held in said jaws adjacent the Work to be riveted and to Withdraw said jaws from adjacent said work, and stops determining the limits of movement of said slide.

EBEN D. TAYLOR, 

